A strength of using an application form as a selection device is that ______________.

The strength of using an application form as a selection device lies in its ability to gather relevant biographical information that can often be verified, which is essential for making informed hiring decisions. Research indicates that certain biographical details—such as education, work experience, and employment history—can be associated with job performance. By using an application form, employers can obtain standardized information that allows for comparisons among candidates, ensuring objectivity in the selection process. This verifiability of facts is key as it supports the development of a reliable profile of an applicant's qualifications and can predict their potential job performance in some roles.

In contrast, options that emphasize the form's informal nature, the extent of details provided, or its adaptability for various positions do not directly address the significance of the information's validity or reliability in predicting job success, which is the core reason option C is the strongest answer.